<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

<form action="/upload" method="post" enctype="multipart/form-data">
    姓名：<input type="text" name="name"><br>
    年龄：<input type="text" name="age"><br>
    头像：<input type="file" name="file"><br>
    <input type="submit" value="提交"></input>
</form>
</body>
</html>